(From Wikipedia): Anibal Troilo was a bandoneon player, composer, arranger and bandleader in Argentina. His orquesta típica was among the most popular with social dancers during the golden age of tango (1940-1955), but he changed to a concert sound by the late 1950s. Troilo's orchestra is best known for its instrumentals and also recorded with many vocalists.

00:04

In this chapter, we’re going to teach you
how to rock.

00:06

And to define, what is a rock?

00:08

A rock is like this… where you’re just going
back and forth between your feet.

00:13

But it’s remarkably hard actually.

00:15

And unfortunately - yea-

00:17

And unfortunately it’s one of those steps that really
you’re sort of expected to know earlier on.

00:21

So we’re teaching it to you early,
even though you’ll suffer a little bit.

00:25

It’s the best kind of suffering.

00:29

So to begin with, as we rock...

00:30

..leaders, you want to make sure
you have a firm hold...

00:32

..so that your bodies move as one.

00:35

And it will go forward, but not all the way…

00:36

..and back and not all the way.

00:37

So you’ll just go backward and forward
between your feet.

00:39

And it’s very common to turn softly as well.

00:44

Now some comments.

00:45

I want you to think about the rock almost like
water sloshing in a bowl.

00:49

The water goes ‘Woosh, woosh.’

00:52

And so you’ll go over and back
and over and back.

00:57

And so you’ll see you’ll spend most of the time
actually at the ends...

01:00

..as you rush through the middle
like the water in the bowl.

01:12

Now, some things to avoid.

01:15

One thing is that often times the ladies will
go to their back foot too much.

01:20

And then for the guys,
you don’t hold her tight enough.

01:22

And we’ll show you the bad and
we’ll show you the good.

01:24

Yes I’m good at this bad.

01:26

Well you’re good at the good too.

01:27

Yes, thank you.

01:29

So here’s the bad and you see how
she’s pulling hard.

01:33

Yea.

01:34

So she’s pulling me back.

01:36

It’s like “Whoa” and then he almost falls over
forward if he is not ready.

01:43

So instead notice how as she goes back,
she still keeps her energy forward towards me.

01:47

Not just my energy,
I keep my chest forward too.

01:50

Yes, both.

01:52

Now for the leaders, there’s this instinct...

01:54

..I hope it doesn’t make the microphone
make too much bad noise...

01:57

..but of not holding close enough
and tight enough.

02:00

And so what happens is...

02:01

..if I don’t hold her very tight
and I’m sort of like this…

02:05

..as we rock it’s like “Boing, Boing.”

02:08

D: She’s bouncing between -
N: This is not fun.

02:10

N: That's enought of that.
D: She’s bouncing - yea.

02:11

She’s bouncing between my back arm and my chest.

02:13

And so it’s like “Bang, bang, bang, bang.”

02:15

So instead think you hold her firmly.

02:18

Really firmly.

02:26

And then that way, there’s no slack or
looseness in the system...

02:30

N: Banging.
D: ..so she doesn’t ricochet back and forth.

02:32

As you’re practicing this at home,
even if you don’t have a partner…

02:36

..I want you to realize that the
quality of the embrace of your partner…

02:40

.. that you can keep a tighter hold,
so there’s no slack

02:43

..or that for the ladies...

02:45

..that you can be conscious of staying forward
with your chest towards your partner…

02:48

..that you can do this even without a partner,
in your mind, and this counts.

02:52

Watch, he’ll do it without a partner.
It’s a great idea.

02:56

Not as fun as with a partner
but it works.

03:03

See, you can see me right there.

03:05

Right, I’m really holding someone
and then I rock.

03:10

D: Or we can do it with a partner.
N: And now you can still see me rocking there.